To make the Messenger iOS app faster, smaller, and simpler, we rebuilt the architecture and rewrote the entire codebase.
FB ENGINEERING –
PROJECT LIGHTSPEED
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![](https://www.lubomiramilkova.com/wp-content/uploads/2020/07/FB_LIGHTSPEED_Wide_logo.jpg)
To make the Messenger iOS app faster, smaller, and simpler, we rebuilt the architecture and rewrote the entire codebase.